I-Pin is an infant assassin originally from Hong Kong. Although the 5 year old I-Pin cannot speak Japanese fluently, the 15 year old I-Pin goes to a Japanese College. Despite Fuuta ranking her as the 3rd most promising Assassin out of 52,262 people, she manages to work part time in a Ramen restaurant, but she still has the skills she had as an assassin. Mr Kawahira is a frequent customer of the Ramen shop that future I-Pin works in, although it seems that she always seems to get struck by the Ten Year Bazooka, and the noodles become soggy, to Kawahira's great distaste. Upon first impressions it was thought that I-Pin was actually male because of her unfeminine appearance. She often beats up Lambo and calls him a "Broccoli Monster" because of her short sightedness. She is shown to have a large crush on Kyoya Hibari and whenever she sees him, her Pinzu-Timed Super Explosion activates. However, she seems to have controlled this in the future.

Martial Arts: She has shown exceptional capabilities of an unknown Martial Art.

Gyoza-Kempo This is I-Pin's signature attack. By combining her martial art skills with a special garlic laced dumpling, I-Pin is able to send a wave of Garlic Breath towards he foe, nullifying their brain and making their limbs move involuntarily.

Pinzu-Timed Super Explosion: Whenever I-Pin becomes embarrassed a Count Down starts, visible on her head in the form of Mahjong Symbols. When the count down reaches zero she becomes a human bomb, creating an explosion capable of making a small crater. Reborn then states that "Broccoli Monster" is the password to unlocking this technique at any given time.

Daisangen: This is a move that only Adult I-Pin has been shown to know. She lays on the enemies shoulders while they're still standing, locking both their arms and head. From there she then breaks their arms and neck. However, she has only performed this on un-human looking people. Daisangen is a yaku in the game Mahjong, known more so as the Big Three Dragons. When performing this moves, the shouts out "Haku", "Hatsu" and "Chun", which are key tiles for Daisangen.